The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 2026

Continental TSIO-520 series

4,114 aircraft on the U.S. register carry a Continental TSIO-520 series engine, rated at about 300 horsepower. The Cessna T210 Turbo Centurion is the model most often fitted with it (1,006 aircraft). The aircraft carrying it were built between 1967 and 2003.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Continental TSIO-520 series (2 codes). FAA spellings: TSIO-520 SER · TSIO 520 SER.

When the aircraft were built by decade

By decade built, as a table
aircraft
19404
19502
196080
19702,151
19801,302
199089
200031

What the FAA has certified, ordered and been told about the Continental TSIO-520 series the component layer

The design is held under 1 type certificate (E8CE, held by Continental Aerospace Technologies, INC.). The FAA has issued 36 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 411 failure reports with the FAA since 1995, 9 of them in the last ten years.

FAA orders 36 airworthiness directives · newest first

2023-10-262023-17-04 · Reciprocating Engine Oil System · engine
2023-07-172023-09-09 · Exhaust Turbine System (Recip) · engine
2023-03-152023-05-16 · Reciprocating Engine Power Section · engine
2023-02-232023-04-08 · Reciprocating Engine Power Section · engine
2023-02-172023-02-12 · Engine Air Intake System · engine
2022-08-152022-16-03 · Engine (RECIPROCATING) · engine

All orders naming the Continental TSIO-520 series

Failure reports 411 since · what operators and shops told the FAA

0193857769601061116226
Failure reports by year, as a table
reports
962
973
981
991
005
0165
0276
0357
0437
0543
0611
0721
0814
096
1020
118
129
137
146
154
166
192
203
241
251
262

Parts most often reported as the reports name them

Cylinder25Master Switch21Line20Control Cable14Bolt12Relay10Pump9Actuator8Alternator8Skin8
Parts most reported, as a table
reports
Cylinder25
Master Switch21
Line20
Control Cable14
Bolt12
Relay10
Pump9
Actuator8
Alternator8
Skin8

Latest reports

2026-05-07Alternator: destroyed
2026-05-07Alternator: destroyed
2025-09-12Pump: leaking
2024-03-15Cylinder Head: separated
2020-12-24Fitting: broken

Certificates and bulletins

E8CEType certificate held by Continental Aerospace Technologies, INC. · 31 models listed · revised April 6, 2020

Safety bulletins 11 · advice, not orders

2020-04-06NE-20-05 · POWERPLANT - Engine Camshaft Gear Tooth Fracture
2018-06-20NE-18-16 · POWERPLANT Alternator Drive Coupling
2017-05-10NE-17-11 · POWERPLANT Engine damage as a result of kickback
2016-03-08NE-16-13 · Powerplant - Prohibited use of sealant
2013-02-08NE-13-15 · Engine Controls: Continental Motors, Inc. (CMI) Throttle and Mixture Control Levers

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Biggest operators
Airworthiness

The whole map of how records connect · these connections as data: /graph/engine/continental-tsio-520-series.json.

Aircraft newest certificates first · 4,114

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N756ZH Cessna
TU206G
Fixed-wing, single engine Heartland Aviation INC
Alliance, Nebraska
Standard ValidFAA registration status code V: Valid registration. All codes
N761RG Cessna
T210M
Fixed-wing, single engine Bas Part Sales LLC
Greeley, Colorado
Standard Valid (manufacturer)FAA registration status code M: Valid, assigned to the manufacturer under its dealer certificate. All codes
N774DC Cessna
340A
Fixed-wing, multi-engine Bas Part Sales LLC
Greeley, Colorado
Standard ValidFAA registration status code V: Valid registration. All codes
N78S Cessna
340
Fixed-wing, multi-engine Bas Part Sales LLC
Greeley, Colorado
Standard ValidFAA registration status code V: Valid registration. All codes
N7LV Cessna
P210N
Fixed-wing, single engine Bas Part Sales LLC
Greeley, Colorado
Standard ValidFAA registration status code V: Valid registration. All codes
N8081R Beech
V35A
Fixed-wing, single engine Individual owner
New Mexico
Restricted ValidFAA registration status code V: Valid registration. All codes
N8223Q Cessna
414
Fixed-wing, multi-engine Bas Part Sales LLC
Greeley, Colorado
Standard ValidFAA registration status code V: Valid registration. All codes
N864JB Piper
PA-46-310P
Fixed-wing, single engine Bas Part Sales LLC
Greeley, Colorado
Standard ValidFAA registration status code V: Valid registration. All codes
N89EP Cessna
T210L
Fixed-wing, single engine Bas Part Sales LLC
Greeley, Colorado
Standard ValidFAA registration status code V: Valid registration. All codes
N9111P Piper
PA-46-310P
Fixed-wing, single engine Bas Part Sales LLC
Greeley, Colorado
Standard ValidFAA registration status code V: Valid registration. All codes
N920GG Cessna
T210L
Fixed-wing, single engine Abbott Air INC
Hydro, Oklahoma
Standard ValidFAA registration status code V: Valid registration. All codes
N944DH Cessna
P210N
Fixed-wing, single engine South Delta Aviation INC
West Helena, Arkansas
Standard ValidFAA registration status code V: Valid registration. All codes
N95BH Beech
58P
Fixed-wing, multi-engine Individual owner
Louisiana
Standard CanceledFAA registration status code 18: Sale reported, canceled. All codes
N9923Y Cessna
T210N
Fixed-wing, single engine Individual owner
Pennsylvania
Standard ValidFAA registration status code V: Valid registration. All codes

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.